Private System Calls
Some system calls are private implementation details of Oracle Solaris subsystems that span the user-kernel boundary. As such, these system calls do not have man pages in man page section 2. Examples of system calls in this category include the signotify system call, which is used as part of the implementation of POSIX.4 message queues, and the utssys system call, which is used to implement fuser. For more information, see the 
                     fuser(8) man page.